 And I know this is nuts, but the amount of sleep you get is 100% connected to your HRV. If you're not sleeping very well and you have insufficient sleep, meaning it's of low quality, your HRV will drop drastically. But if you sleep really well, you're getting really good deep sleep, your HRV will go up. And an HRV over 50 is considered phenomenal. So some of you might be putting your rings on and it's coming back at like 19 or 20 and we'd be going...